Brake-shoe.



J. D. BISTINE & B. C. ROWELL. L. c. nowm, EXECUTRIX or B. c. Rev/ELL. nsc'n. BRAKE SHOE.

191 ?4:65' APPLICATION FILED use. s, m l- Patented June 13 1916.

2 SHEETS-SHEET I.

JOHN D. RISTINE AND BENTON C. ROWELL, OF CHICAGO, ILLINOIS; LILLA G. HOWELL, OF CHICAGO, ILLINOIS, EXECU'I'RIX OF SAID BENTON C. ROWELL, DECEASED.

BRAKE-SHOE.

memes.

Specification of Letters Patent.

Patented June is, rare.

To all whom it may concern:

Be it known that we, JOHN D. RISTINE and Burrow C. RowELL, cltizens of the United States, and residents of Chicago, in

the State of Illinois, have invented certain new and useful Improvements in Brake- Shoes, of which the following is a specification.

Our present invention relates to the wearing blocks or shoes commonly used on railway rolling stock, and more particularly to brake shoes containing strengthening and wear resisting inserts, and has special reference first to the provision of an improved type of shoe of the character referred to wherein the inserts are firmly anchored in the body of the shoe, second a shoe wherein the reinforcement of the lug is not only anchored in the body but also may be anchored to the other reinforcements or inserts; and, third, an improved shoe wherein the dressing effect of the insert on the tread of the wheel is more evenly distributed across the tread surface.

The principal objects of our present invention are the provision of an improved anchorage for the wearing inserts, one which engages both the insert and the body of the shoe, and one which may serve as an anchorage for the reinforcement used for strengthening the attaching lug; the provision of an improved form of wear resisting insert which will not only distribute its dressing effect over substantially the entire surface of the tread portion of the wheel, but will also serve, in the event of breakage, to restrain any portion of the insert or of the body portion of the shoe from disengagement and falling upon the track; the provision of an improved form of reinforcement of the attaching lug, and of anchoragefor such reinforcement, in order to prevent the shoe from becoming disengaged from the brake head and falling upon the track in the event of the fracture of the cast metal portions of such attaching lug, or the insert from falling upon the track should it in anywise become disengaged from the body portion of the shoe; the provision of an improved form of strengthening insert or steel-back for thebody of the shoe; together with such further objects .as may be below disclosed.

In the attainment of the objects referred to, and gaining certain further benefits to be hereinafter mentioned, we have provided a construction, one embodiment of which is illustrated inthe accompanying drawing, wherein- Figure 1' is an elevational view, partly in section, illustrative of our invention; Fig. 2 is a plan view of thewear resisting-insert faced in the face of the shoe of Fig. 1; Fig. 3 is an enlarged sectional view taken along the line III-III of Fig. 1; Fig. 4 is a detailed perspective view of the reinforcement used for strengthening the attaching lug; Fig. 5 is a plan view of the wear resistinginsert placed in the face of a modified form of device. Fig. 6 is a vertical longitudinal section of a. mold, illustrating the improved method of assembling the parts, in the manufacture of brake shoes embodying our inventions; and Figs. 7 and 8 are respectively an elevational view, partly in section, of a modified form of shoe and a face view of the wear resisting insert employed therein.

Referring first to Fig. 1 it will be observed that in carrying out our invention we employ a body portion 10 which is here illustrated as a M. C. B. standard railway car shoe, though obviously our invention is equally applicable to other types of shoes, such body portion 10 being preferably made of relatively soft metal such as gray cast iron, a relatively hard insert 11 such as white cast iron and, as means for anchoring the insert 11 in the body 10, a pair of members 13 and let engaging the insert portions 11 and 12 and such body 10, and serving also as a back to strengthen the body of the shoe, such members 13 and 1st being preferably of steel, though they may be of such other tenacious ductile metal as may be conveniently available.

Referring now more particularly to Figs. 2 and 3 it will be observed that the insert portions 11 and 12 are preferably spaced apart a distance substantially equivalent to the width of one of them, as indicated at 15, to the end that the entire tread portion of the wheel between the points indicated at 19 and 20 may be Subjected to the dressing effect of such inserts. As is most clearly to be seen in Fig. 3, the insert portions 11 and 12 have embedded therein at the time of casting of such inserts, the back and anchoring members 13 and 14; which should have means for engaging the cast metal of the body of the shoe 10 being preferably of irregular contour or having projections for such purpose, a convement inexpensive and otherwlse desirable form of such back I and anchoring members being that of the channel beams which we have illustrated in.

-Fig. 3.

"On viewing Figs. 3 and'4, it will be seen that for the. purpose of reinforcing the attaching lug 23 we make use of a strap 24 surrounding the top and sides of the keyway 25,, the parallel sides 27 and 28 ofsuch attaching lug being here shown as provided with flanges 29 and 30 each conveniently adapted'to contact with one ofthe flange and web surfaces of one of the members 13 and 14,;and at the bottom to abut against one of the inserts 11 and 12. When the legs 27 and28 are pressed together, they are invin Figs. 2 and 3. While the members 11 and 12 are not necessarily connected at their outerends, asindicated at 31 and 32, (Fig. 2) we find itexpedient so to do, desirable for the purpose of preventing any broken away portionofthe shoe body from disengagement therefrom, and convenient for the purpose of maintaining the strap 24 in position during the act of pouring the shoe.

On inspection of Fig. 5 wherein we have illustrated a modification of our invention,

it will be observed that the structure here illustrated is in all essential respects similar to that illustrated in Fig. 2, save that the insert portions ll and 12 are provided with offset portions asindicated at 17 and 18, instead of being substantially straight throughout their length as shown in Fig. 2, and that to the end that they may most firmly hold the insert portions 11 and 12 in place in the body of the shoe, the strengthening and anchoring members13 and 14 are provided with off-set portions such as are indicated at v29 and 30 in Fig. 5 which i so ' resisting. inserts are not employed as when further serve tov maintain such members 13* and 14 in centralpositionin the inserts 11 and-12 Referring now moregparticularly to Figs. 6, 7 and 8 itwill be noted that we have here illustrated a modified form of shoe, and a mold which is useful for making the same as well as various types of shoe embodying our present IIIVBIltlOIlS, as well when wear such inserts are utilized by us.

connected.

arate pieces of material, and that instead of beingarranged diagonally'of the shoe, as c in Fig. 2, or provided with offsets, as in Fig. 5, they are arranged in substantial parallelism to the longitudinal axis of the shoe. Furthermore, "for the purpose of avoiding the presentation of a large surface of hard metal to'the wheeltread, and thus avoid scoring of suchtread, prior to such time as the shoe has become worn to a good even bearing on such tread, we cut away the wearing inserts 11 and 12 as indicated at 31 32, so that at the time of pouring such cut away spaces are filled with the softer cast metal as is clearly to be seenupon inspection of the mold 32 (Fig. 6). 'Forthe purpose of varying the contact of the outstanding portions 33, 34, remaining on such wearing inserts 11 and 12 as wearing blocks after the portions 31, 32 are cut away, and thus presenting alternate hard and soft surfaces of varying widths, we narrow certain of the blocks as indicated at 33, 34, and widen other of the blocks, preferably those disposed opposite to the blocks 33, 34, as indicated at 35, 36, respectively, thus presenting. a doubly oblique and complementarily offset arrangement of wearing blocks.

While the structure of Fig. 2 is more advantageous in that it is simpler than that" of Figs. 5 and 7, the structure of Fig. 5 is advantageous in that by reason of the offsets 29 and 30 the members 11 and 12 are .more positively restrained from any possibilityof longitudinal movement relatively A r to the body portion 10 than arethe members 11 and12 of Fig. 2, and the structure of Fig. 7 is advantageous in that the wearing blocks are surrounded byv portions of relatively softer metal, especially at the time the shoe M is first applied to the car. I On inspection of'Fig. 6 it will be manifest that when use is made of the strap 24 .and members 13 and 14 formed of a single piece of material, orftwo pieces suitablycom nected, no pins or other supportingmembers are required to be used at the time of pouring, and that the use of such supports is also avoided when the members 13 and 14 have wearing blocks which are connected at their ends, for example, asindicated' at 37 and 38 (Fig. 8) and regardless of whether the members 13 and 14 are made of.

a single piece of material orare otherwise Having thus described our invention and illustrated its use, what we claim as new and desire tosecure by Letters Patent is:

' 1. In a brake shoe, in combination, a body portion and a strengthening insert comprising a plurality of substantially vertical and parallel channeled portions having the flanges thereof projecting inwardly, said portions being of greater height than breadth and extending longitudinally of,

the shoe.

2. In a brake shoe, in combination, a body provided with an attaching lug of cast metal, a plurality of substantially parallel insert portions each provided with an anchor of substantially channel form engaging said body, and a ductile metal member reinforcing said lug and engaging said anchors.

3. In a brake shoe, in combination, a body provided with an attaching lug of cast metal, a plurality of substantially parallel insert portions each provided with an anchor of substantially channel form having their flanges directed toward the center of said body engaging said body, and a ductile metal member reinforcing said lug and engaging said anchors.

4. In a brake shoe, in combination, a plurality of substantially parallel insert portions each provided with an anchor of substantially channel form engaging said body and a ductile metal attaching lug engaging said anchors.

5. In a brake shoe, in combination, a body portion, an attaching lug and a strengthening insert comprising substantially parallel portions attached at one of their ends and adapted to engage said lug therebetween before casting, said body being cast about said lug and insert whereby said lug and insert are held in a predetermined relation relatively to said body.

6. In a brake shoe,in combination, a body portion, an attaching ing, and a strengthening insert comprising substantially parallel flanged portions connected at one of their ends and adapted to engage said lug between said flanges before casting, said body being cast about said lug and insert whereby said lug and insert are held in predetermined relation relatively to said body.

7 In a brake shoe, in combination, a body portion, a flanged attaching lug, and a strengthening insert comprising substantially parallel flanged portions connected at one of their ends and adapted to engage said lug between said flanges before casting, said body being cast about said lug and insert whereby said lug and insert are held in predetermined relation relatively to said body.

8. In a brake shoe, in combination, a body portion, an insert adjacent the wearing face copies of this patent may be obtained for the cents each, by addressing the thereof, a longitudinally disposed and channeled anchoring member having its flanges arranged laterally, one flange embedded in said body portion and the other flange embedded in said insert.

9. A brake shoe comprising a cast metal body and a plurality of oppositely arranged wearing insert portions extending toward the face of the shoe, said insert portions being provided with wearing blocks of varying widths, the relatively narrower and relatively wider blocks being disposed in alternation on said oppositely arranged insert portlons.

10. A brake shoe comprising a cast metal bodv and a plurality of oppositely arranged wearing insert portions extending toward the face of the shoe, said insert portions being provided with wearing blocks of varying widths, certain of said blocks being separated adjacent the face of the shoe by extensions of the cast metal of the body of the shoe.

11. In a brake shoe, in combination, a body provided with an attaching lug of cast metal, a wearing insert, an anchor engaging said wearing insert and said body, and pro vided with an inwardly turned flange and a ductile metal member reinforcing said cast metal lug and engaging said flange.

12. In a brake shoe, in combination, a body, an insert adjacent the wearing face thereof provided with an inwardly turned flange, and a ductile metal attaching lug engaging said flange.

13. In a brake shoe, in combination, a body, a plurality of substantially parallel insert portions each provided with anchoring flanges directed toward the center of said body, and a ductile metal attaching lug engaging said flanges.

14. In a brake shoe, in combination, a body, a wearing insert adjacent the wearing face thereof, a separate ductile metal member adapted for engagement with the brake head, and a flanged reinforcing member engaging said member and embedded in said insert and said body and wholly surrounded thereby.

In testimony whereof we have hereunto signed our names in the presence of the two subscribed witnesses.

JOHN D. RISTINE. BENTON C. HOWELL.

Witnesses MARTHA WEsTMAN, PAUL CARPENTER.

canmimoner e! Fatah,

Washington, D. 0. 

